This study explores the link between community risk factors and childhood obesity using data on child obesity from the 1988-1994 National Health and Examination Survey, the 2002-2004 National Medical Expenditures Survey, and the 2003-2004 National Survey of Children's Health, combined with data on community characteristics from a wide variety of sources. Multivariate models that relate child obesity to the characteristics of the child's community are used to predict the "risk of childhood obesity" for communities in the United States. The report includes maps and community profiles for 50 states and the District of Columbia.